MIL-DTL-38999 Series I connectors, designed for harsh environments, feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, these connectors are environmentally sealed and can withstand temperatures ranging from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. The high-strength aluminum shells come with plating options including cadmium and nickel finishes. RoHS certified cadmium-free versions are also offered, making them suitable for a range of applications requiring reliable and durable connectivity.